"Right. Go to the head of the class," interrupted Stacy.
"Chunky, you keep out of this. You'll mix him up."
"Guess somebody's mixed up already," retorted the fat boy.
"Five is right," continued Tad. "Five dollars is what we owe you. Is that clear now?"
"Si, señor. But I work one week. Juan earn ten dollar—"
"I'll tell you what to do," interjected Ned. "Start all over again. You begin work to-day; Juan, and we'll pay you ten dollars for every week from now on. You haven't worked for us before to-day, you know."
The lads laughed heartily, but Juan merely showed his teeth, protesting that he had earned ten dollars.
"Here," said Tad, thrusting a five dollar bill at him. "You take this. It's all we owe you. If you see any of your friends, you ask them how much we owe you. They'll tell you the Professor is right."
Juan took the money greedily, still protesting that they owed him ten dollars, because he had worked a week. Mounting his burro, he rode away; at once falling into the marvelous speed that he had shown them on the first day out.
The lads shouted with laughter as they saw burro and rider disappear among the foothills, both running for all they were worth, Juan uttering his shrill "yi-yi's," as he pedaled the ground.